Optical Cell (IMAGE) Helmholtz Association Caption Inner part of the gas-filled optical cell for laser spectroscopy of nobelium isotopes: the fusion products enter the cell through a thin Mylar foil (l.) before being stopped in the gas and captured on a filament wire (r.). Heating the filament releases the atoms for laser spectroscopy. Credit M. Laatiaoui, GSI Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.